The WKB approximation (see Challenge Problem 40.57) can be used to calculate the energy levels for a harmonic oscillator. In this approximation, the energy levels are the solutions to the Equation Here E is the energy, U(x) is the potential-energy function, and x = a and x = b are the classical turning points (the points at which E is equal to the potential energy, so the Newtonian kinetic energy would be zero).rgy levels given by Eq. (40.26)? Does the WKB approximation give an underestimate or an overestimate of the energylevels?

Iva 2m[E-U(x)]dx = [VR 24 - [VR () dx x +A2 arcsin - csin nh 2 - n = 1, 2, 3,...